JPS5836029Y2 - Remaining amount enlarged display type liquid level meter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid level meter that uses a single liquid level meter and automatically switches between a plurality of meter ranges to display an enlarged display of the remaining level.

For example, in conventional automotive tsuyuel gauges, a float equipped with a grounded movable contact changes the resistance value of a single current limiting resistor by responding to the liquid level, and the change in resistance value is displayed on the ammeter. The type that forces you to do so is common.

However, this type of tsuyuel gauge has a low meter reading and has a large reading error, especially when the remaining amount is low, which often causes so-called gas shortage troubles.

In view of the drawbacks of the prior art, the present invention provides a liquid level meter that can display the remaining amount in an enlarged manner by automatically switching the meter range of the liquid level meter to two or three levels. .

Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 1 shows, for example, a fuel meter M for an automobile, in which the remaining amount is displayed from 50 liters when full to, for example, 10 liters in one scale range (runge).
When the point has slightly decreased to 0 liters, the pointer instantly returns to the full scale (scale 50 position) and the remaining amount is 0.
It is possible to display up to liters in another scale range (second range).

In the second range, a change in the remaining amount of 40 liters is displayed, while in the second range, a change in the remaining amount of 101 liters is displayed in the same needle stroke. It will be easy to see how the display is magnified and performed with high precision.

The fact that the liquid amount is displayed by the second range is notified, for example, by lighting the lamp L.

In the circuit diagram of FIG. 2, one end of the meter M is connected to the batch IJB via a regulator R for adjusting the index.
The other end is connected to terminal 1 of the Tsuyuel sender gauge S,
The second range indicator light is connected between the battery B and the terminal 2 of the Tsueru sender gauge S.

As shown in FIG. 3, the Tsueru sender gauge S is composed of a substrate 4 provided with a first resistor R1, a second resistor R2, a conductor 5, and a ground wire 6.

These may be printed wiring on an insulating substrate.

One end of the first resistor R1 and the second resistor R2 is connected to the terminal 1.
Further, one end of a conductor 5 and a ground wire 6 are connected to the terminals 2 and 3, respectively.

The float F floating on the liquid surface is provided with three movable contacts: a movable contact A for contacting the resistor, a movable contact B for contacting the conductor 5, and a movable contact C for contacting the ground wire 6. and they are interconnected.

One end of each of the first resistor R1 and the second resistor R2 is both connected to the terminal 1, but the free end of the first resistor R1 and the connecting end of the second resistor R2 (the end connected to the terminal 1) are , are placed close to each other at a predetermined point (level position indicated by LV) on the substrate.

The movement trajectories of movable contacts A and B are indicated by dotted lines X and Y.

The conductor 5 has a trajectory Y in the range from the terminal 2 to the level LV.
If the movable contact B is not located above the level LV and is below the level LV,
The conductor 5 is arranged so as to be located on the locus Y so that electrical contact between the conductor 5 and the conductor 5 is maintained.

Contact between the movable contact C and the ground wire 6 is maintained throughout the entire movement of the float F.

Terminal 3 is grounded.

The operation of the liquid meter according to the embodiment of the present invention having the structure described above will be explained below.

When the tank is full, the float F is at the highest level, that is, the movable contact A is in contact with the tip of the first resistor R1, and the contact point is movable contact A - movable contact C - ground wire 6 - terminal 3 - ground. grounded by the circuit.

Therefore, the predetermined current regulated by regulator R is
Since the current is flowing, the pointer of meter M indicates the 50 liter scale of the full scale.

As the flow 1-F decreases as fuel is consumed, the contact point between the first resistor R1 and the movable contact A decreases, and therefore the resistance value of the resistor R1 increases in proportion to the remaining amount.

Therefore, the deflection of the meter M decreases, and when it passes the predetermined level LV, that is, 10 liters, the movable contact A
is separated from the free end of the first resistor R1 and comes into contact with the tip of the second resistor R2.

Since the current limiting resistance value at this time is O, the pointer of the ammeter swings to the full scale position as in the case of the above-mentioned lunge.

On the other hand, movable contact B starts to make contact with conductor 5 at this point, so that one end of lamp L is grounded via conductor 5 and lights up, indicating that the meter range has been switched.

The further decrease in the remaining amount is indicated by the meter as the second resistance value increases in the same manner as in the above operation.

Although the total resistance values of the first and second resistors R1 and R2 are both set to be equal, the position of the level LV also depends on the shape of the fuel tank, but in a fuel tank where the surface area of the fuel always remains unchanged. If so, in the case of this embodiment, the movable contact A,
This is a type in which B does not move in a straight line up or down, but moves in a circular arc.

Movable contacts A and B are provided at the tip of an arm 6 that rotates around a fixed point P as the center of rotation.

Further, the support arm 7 of the float F is rotatably supported by a part of the arm 6.

Since the movable contacts A and B are always grounded by configuring the arm 6 with a conductor and grounding the fixed point P, the movable contact C and the ground wire 6 described in the previous embodiment are omitted in this embodiment. I can do it.

The present invention is widely applicable not only to fuel tanks but also to radiator fluid, washer fluid, and other liquid tanks.

The present invention has the above-mentioned configuration and operation, and has the following effects.

The movable contact provided on the float has a first resistor that conducts and whose resistance value changes only when the liquid volume is above a predetermined level, and a second resistor that conducts and whose resistance value changes only when the liquid volume is below a predetermined level. , automatically switches at the position of the predetermined liquid amount, and automatically conducts with the conductor only when one of the two resistors, for example, the second resistor, is conductive, and lights up the indicator light.

As a result, the amount of displacement of the pointer of the liquid meter is larger than before, and the accuracy of liquid level display is improved, and the dual liquid level display state of the pointer is automatically switched to easily distinguish between them, and the predetermined liquid level can be easily distinguished. The indicator light can warn you that the temperature has dropped to below.

[Brief explanation of the drawing]

Fig. 1 is a front view of the remaining amount display meter, Fig. 2 is a circuit diagram showing an embodiment of the present invention, Fig. 3 is a plan view showing the configuration of the transmitter gauge of the embodiment shown in Fig. 2, and Fig. 4 The figure is a schematic configuration diagram showing another embodiment of the present invention. Explanation of symbols, 1, 2, 3...terminals, 4...
...Conductor, 6...Ground wire, M...Meter, L...Lamp, B...Battery, S...Tsuyueru Sender gauge, R1, R2
······resistance.

Claims (1)

[Scope of utility model registration request] In a liquid meter that displays a liquid quantity meter by the resistance value changing action of a variable resistor whose resistance value changes according to the liquid quantity, a float having a grounded movable contact and displacing according to the liquid quantity; A first resistor whose resistance value changes depending on the liquid amount only between the maximum liquid amount and a preset predetermined liquid amount when the movable contact is displaced; a second resistor whose resistance value changes according to the liquid amount only between a predetermined liquid amount and the minimum liquid amount; and a continuity indicator light with the movable contact only when one of the two resistors is conductive. The variable resistor is provided with a conductor for lighting up, and each of the two resistors has one end connected in parallel to the liquid volume meter, and is arranged so that conduction is switched by the movable contact at the position of the predetermined liquid volume. A fluid meter with an enlarged remaining amount display.